EP1672770B1 - Machine sans palier avec dispositif de transport immobilisant le rotor par rapport au stator - Google Patents

Machine sans palier avec dispositif de transport immobilisant le rotor par rapport au stator Download PDF

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Publication number
EP1672770B1
EP1672770B1 EP05020865A EP05020865A EP1672770B1 EP 1672770 B1 EP1672770 B1 EP 1672770B1 EP 05020865 A EP05020865 A EP 05020865A EP 05020865 A EP05020865 A EP 05020865A EP 1672770 B1 EP1672770 B1 EP 1672770B1
Authority
EP
European Patent Office
Prior art keywords
torque motor
spacer
rotor
stator
air gap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05020865A
Other languages
German (de)
English (en)
Other versions
EP1672770A1 (fr
Inventor
Stéphane Vogt
Nicolas Corsi
Fabien Dachaud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Etel SA
Original Assignee
Etel SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Etel SA filed Critical Etel SA
Publication of EP1672770A1 publication Critical patent/EP1672770A1/fr
Application granted granted Critical
Publication of EP1672770B1 publication Critical patent/EP1672770B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/16—Centring rotors within the stators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine

Definitions

  • the invention relates to a frameless torque motor with a transport lock. Such torque motors are used in many modern drive solutions.
  • Torque motors which have on a rotor a number of magnets and in a stator a number of coils on the teeth of a Blechpaktes. Such torque motors can generate high torque even at low speed. This allows extremely smooth movements and excellent speed control. Since the load is coupled directly to the motor by eliminating power transmission elements, these systems offer very high dynamics, rigidity and control accuracy that are superior to all conventional drives. Torque motors reduce operating costs, simplify machine design, do not wear and require no maintenance.
  • Frameless torque motors are integrated directly into the respective application.
  • the position of the rotor and the stator to each other will not defined by its own bearing the torque motor, but directly by the structural design of the application.
  • Typical applications include rotary tables or swivel axes in machine tools, telescopic drives or automatic placement machines.
  • a transport lock a so-called motor bridge used. This consists of one or more parts, which are bolted to the rotor and the stator along the circumference, after they have been aligned with a centering device to each other.
  • the motor bridges are usually made of non-magnetic material such as aluminum. This allows the motor bridges to be easily aligned and fastened to the torque motor. Since the magnetic forces between the magnets of the rotor and the laminated core of the stator are very high, the motor bridges must be made very stable. A contact of the magnets of the rotor with the laminated core of the stator must namely be avoided under all circumstances. A separation of the two parts would be very difficult to accomplish. Such motor bridges are thus relatively complex and expensive. They must therefore be returned to the manufacturer of the torque motor after installation of the torque motor in the respective application, which means a significant logistical effort.
  • the US 5952746 shows a transport lock for a rotor and a stator of an electric machine, wherein the transport lock comprises a shoulder on the stator, against which the rotor is urged by means of fixing screws.
  • the object of the invention is therefore to provide a simpler and more cost-effective transport security for frameless torque motors.
  • a frameless torque motor which has a ferromagnetic primary part and a secondary part with magnets facing the primary part
  • primary part and secondary part are kept at a distance by a transport lock.
  • the primary part and the secondary part are fixed to one another by the magnetic force of the magnets.
  • the transport lock consists of a spacer, which is arranged in the air gap between the primary part and the secondary part.
  • Primary part and secondary part are connected to each other without any screw only by the force of the magnets of the secondary part.
  • the spacer is thereby reduced on one side of the torque motor in there Air gap is clamped by the force of the magnets, so that it can not fall out of the air gap.
  • it is advantageous if it has ferromagnetic properties. Then it is also held on the side of the torque motor with extended air gap by the attraction of the magnets.
  • the FIG. 1 shows a section through a torque motor 1.
  • the cutting plane contains the axis of rotation A of the engine.
  • the primary part 2 of the torque motor 1 contains a laminated core with the secondary part 3 facing teeth and windings arranged thereon.
  • the primary part 2 is provided in this example to be fixed and rigid, for example, to be connected to the foundation of a rotary table. It is therefore also referred to as stator 2.
  • the secondary part 3 has the primary part 2 facing magnets 4. It is intended to be rigid with the moving part of the particular application, e.g. to be connected to the turntable of the mentioned round table. About the bearing of the secondary part 3 is then rotatably held relative to the stator 2. It is therefore also referred to as rotor 3.
  • the manufacturer of the torque motor 1 must deliver the stator 2 and the rotor 3 either separately to the manufacturer of the respective application, or initially pre-adjusted by means of a centering device and then fixed and secured to each other.
  • An essential task of the transport lock 5 in the FIG. 1 It is to prevent the direct contact of the magnets of the rotor 3 with the stator 2, as this threatens damage, and a separation would be very difficult to accomplish.
  • a transport lock 5, which fulfills this function, is sufficient, since stator 2 and rotor 3 are sufficiently fixed to each other solely by the force of the magnets 4 of the rotor. Since this fixation is not rigid, the installation in the respective application is facilitated.
  • the rotor 3 is movable in the stator 2 within certain limits against the magnetic force and can therefore be adjusted for installation in the respective application.
  • the transport lock in FIG. 1 consists of a spacer 5, which is introduced into the air gap 6 between the rotor 3 and the stator 2 of the torque motor 1.
  • the spacer 5 may consist of a single circumferential band, but it may also consist of several band segments to save material.
  • the air gap 6 widens accordingly.
  • a circulating as a band, one-piece spacer 5 would not be pinched on this page, but he would not fall out of the torque motor 1, since he would still be clamped on the other side of the engine.
  • the unclamped segments would fall out of the air gap 6.
  • the spacer 5 is preferably made of a material having ferromagnetic properties. It is then ensured that the spacer 5 does not fall out even in the widened air gap 6, since it is held by the magnets 4. Also, the introduction of the spacer 5 in the air gap 6 is facilitated with a ferromagnetic spacer 5, since the spacer 5 adheres to the magnet 4 of the rotor 3, while this is introduced by means of the centering device in the stator 2.
  • the spacer 5 must have a radial thickness that is slightly smaller than the nominal, ie average air gap 6.
  • the radial thickness must also be large enough to prevent excessive adhesion of the rotor 3 to the stator 2.
  • a thickness of about 0.8 mm has been proven.
  • Spacers 5 having a thickness of 0.6 mm were successfully used for an air gap 6 of 0.7 mm.
  • the radial thickness of the spacer 5 should be approximately between 40% -95% of the nominal air gap 6. For smaller values, the rotor 3 is too close to the stator 2, for larger values, the introduction of the spacer 5 in the air gap 6 is disproportionately difficult, since a very precise centering of the rotor 3 in the stator 2 is required.
  • spacers 5 different radial thickness would be useful to avoid better protection against unwanted movement of the rotor 3 in the stator 2 at violent shocks during transport in the region of the enlarged air gap 6. Segments of spacers 5 could then be used, some of which have a radial thickness greater than 100% of the nominal air gap 6. However, in this case the rotor 3 would already have to be introduced into the stator 2 in a decentered manner.
  • the spacer 5 should protrude from the air gap 6 on at least one side of the torque motor 1.
  • the torque motor 1 After the torque motor 1 has been fixed in the respective application, it can be easily removed.
  • the spacer 5 is then no longer clamped and liable only because of its ferromagnetic properties of the magnet 4 of the rotor 3. He can then simply pulled out of the torque motor 1. This is additionally facilitated if it has a device which facilitates gripping of the spacer 5.
  • a gripping aid 7 is in the FIG. 1 shown.
  • the design of this gripping aid 7 is quite arbitrary. It may, for example, be a simple hole through which a finger or a Tool can be inserted, or a loop that allows comfortable gripping the spacer 5.
  • the material for the spacer 5 should be slightly compressible in order to guarantee a minimum distance between the rotor 3 and stator 2. It should also be able to withstand shearing stresses. Namely, the rotor 3 can perform quite small axial movements in the stator 2, which mean a certain shear stress for the clamped spacer 5. However, the rotor 3 will never fall out of the stator 2 because it is prevented by the prevailing magnetic forces therefrom.
  • the material for the spacer 5 should also have a certain tear resistance in order to cope with the loads when pulling out of the torque motor. It would be very difficult to remove in the torque motor 1 remaining parts of a torn spacer 5 from the air gap.
  • Another requirement for the material of the spacer 5 is a certain Teflon-like lubricity on the surface material of the rotor 3. This reduces the forces to be expended on removal of the spacer 5.
  • a material exhibiting all these properties has been found in a PVC coated magnetic sheet, as also used in the manufacture of magnetic tags, e.g. for advertising purposes on motor vehicles can be attached.
  • Such magnetic foils are flexible and have a ferromagnetic core. They are also referred to as magnetic rubber. Due to the additional plastic coating, preferably a PVC coating, they get a good lubricity.
  • magnet foils are already magnetized in their commercially available form, on the one hand when mounting on the rotor 2 does not bother because its magnetization is unequal stronger than that of the magnetic film, on the other hand, this magnetization can even facilitate the handling of the magnetic film.
  • two thinner magnetic foils can be combined to form a two-layer or multi-layer layer, which is then used as a spacer 5 can be used. So you need for different torque motors 1 with different air gap 6 only one type of magnetic film.
  • the magnetization also allows the spacer 5 first to be fastened to the laminated core of the stator 2 and then to introduce the rotor 2.
  • stator 2 can not itself exert magnetic attraction forces.
  • a pleasant side effect of the magnetization of the spacers 5 is also that, despite their slippery surface, they stack well and can be safely deposited, for example, on metallic shelves.
  • Such a magnetic film can either be reused, or simply disposed of. It represents, compared to the engine bridges of the prior art, no significant cost factor.
  • the arrangement of the primary part and the secondary part may well deviate from the exemplary embodiment described here. So the rotor with its magnets can also be outside. Similarly, the secondary part, so the element with the magnets, lying inside or outside, as. Stator be firmly connected to the immovable part of an application. In any case, the torque motor will have an air gap in which a spacer 5 can be used as a transport lock.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)

Claims (9)

  1. Moteur torque sans cadre, doté d'une sécurité de transport, ce moteur (1) présentant une partie primaire (2) ferromagnétique et une partie secondaire (3) avec des aimants (4) qui sont disposés en regard de la partie primaire dont ils sont maintenus à distance par une sécurité de transport (5) constituée d'un espaceur (5) logé dans la fente d'air (6) entre la partie primaire (2) et la partie secondaire (3), caractérisé en ce que la partie primaire (2) et la partie secondaire (3) sont fixées l'une par rapport à l'autre par la force magnétique des aimants (4), la sécurité de transport (5) étant constituée par une feuille flexible qui est introduite en une ou plusieurs parties dans la fente d'air (6).
  2. Moteur torque sans cadre selon la revendication 1, caractérisé en ce que la fente d'air (6), sur un premier côté du moteur torque (1) est réduite à l'épaisseur radiale de l'espaceur (5) qui ainsi est pincé entre la partie primaire (2) et la partie secondaire (3).
  3. Moteur torque sans cadre selon la revendication 1 ou 2, caractérisé en ce que l'espaceur (5) est ferromagnétique.
  4. Moteur torque sans cadre selon la revendication 2 ou 3, caractérisé en ce que la fente d'air (6), sur un second côté du moteur torque situé à l'opposé du premier, est plus grande que l'épaisseur radiale de l'espaceur (5) qui, du fait qu'il est ferromagnétique, est maintenu dans la fente d'air (6) par les aimants.
  5. Moteur torque sans cadre selon une des revendications précédentes, caractérisé en ce que la feuille flexible est une feuille magnétique ou est en caoutchouc magnétique.
  6. Moteur torque sans cadre selon une des revendications précédentes, caractérisé en ce que la feuille flexible porte un revêtement en matière plastique.
  7. Moteur torque sans cadre selon une des revendications précédentes, caractérisé en ce que la feuille flexible est magnétisée.
  8. Moteur torque sans cadre selon une des revendications précédentes, caractérisé en ce que la sécurité de transport (5) dépasse, en direction radiale, de la fente d'air (6).
  9. Moteur torque sans cadre selon la revendication 8, caractérisé en ce que la sécurité de transport (5) présente, à l'extérieur de la fente, une assistance à la saisie (7).
EP05020865A 2004-12-16 2005-09-24 Machine sans palier avec dispositif de transport immobilisant le rotor par rapport au stator Not-in-force EP1672770B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004060506A DE102004060506A1 (de) 2004-12-16 2004-12-16 Rahmenloser Torque-Motor mit Transportsicherung

Publications (2)

Publication Number Publication Date
EP1672770A1 EP1672770A1 (fr) 2006-06-21
EP1672770B1 true EP1672770B1 (fr) 2008-06-04

Family

ID=35929806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05020865A Not-in-force EP1672770B1 (fr) 2004-12-16 2005-09-24 Machine sans palier avec dispositif de transport immobilisant le rotor par rapport au stator

Country Status (5)

Country Link
US (1) US7394177B2 (fr)
EP (1) EP1672770B1 (fr)
CN (1) CN1790875B (fr)
AT (1) ATE397801T1 (fr)
DE (2) DE102004060506A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022099344A1 (fr) 2020-11-13 2022-05-19 Miba Emobility Gmbh Procédé d'installation d'une machine à flux axial
EP4425106A1 (fr) * 2023-02-28 2024-09-04 Sick Ag Dispositif de détermination de position et système de détermination de position et procédé de fabrication associé

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006040118A1 (de) * 2006-08-26 2008-04-10 Zf Friedrichshafen Ag Hybridantriebseinheit
DE102006040611A1 (de) * 2006-08-30 2008-03-06 Robert Bosch Gmbh Direktantrieb
DK2063117T3 (en) * 2007-11-26 2016-12-19 Siemens Ag A device for a direct drive generator, a direct drive generator, turbine and the method for mounting a generator
EP2299560B1 (fr) * 2009-09-22 2018-11-07 Baumüller Nürnberg GmbH Procédé d'introduction d'un rotor d'une machine synchrone dans le stator ou pour l'agencement d'un rotor autour d'un stator et son dispositif de montage correspondant
US8610323B2 (en) 2011-02-04 2013-12-17 Hamilton Sundstrand Corporation Bearingless machine
CN103635002B (zh) * 2012-08-21 2016-03-16 同方威视技术股份有限公司 一体式飞点x光机

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Publication number Priority date Publication date Assignee Title
JPS5478401A (en) * 1977-12-05 1979-06-22 Toshiba Corp Integration and transportation of rotary electric machine
CN85106425A (zh) * 1985-08-26 1987-04-29 株式会社日立制作所 转矩电动机
JPH0687647B2 (ja) * 1985-12-26 1994-11-02 松下電器産業株式会社 電磁機器の組立方法
US5519274A (en) * 1994-09-07 1996-05-21 Rotodynamics-Seal Research, Inc. Magnetically active foil bearing
FR2726948B1 (fr) 1994-11-16 1996-12-20 Wavre Nicolas Moteur synchrone a aimants permanents
US5910691A (en) 1995-03-20 1999-06-08 Wavre; Nicolas Permanent-magnet linear synchronous motor
DE19721528A1 (de) * 1997-05-22 1998-11-26 Still Gmbh Elektrische Maschine und Verfahren zur Montage der elektrischen Maschine an einem Aggregat
IL156995A0 (en) * 2001-02-05 2004-02-08 Kollmorgen Corp Design for frameless cartridge motors
US20050104461A1 (en) 2002-06-25 2005-05-19 Ernst Hatz Method and system for assembling an electricity generating unit
DE10228225B4 (de) * 2002-06-25 2004-05-19 Motorenfabrik Hatz Gmbh & Co Kg Verfahren und Anordnung zur Montage einer Stromerzeugereinheit
AT414289B (de) * 2002-09-30 2006-11-15 M & R Automation Gmbh Verfahren und vorrichtung für eine automatisierte montage von elektromotoren
DE102004005654A1 (de) * 2004-02-04 2005-08-25 Metronic Ag Sicherungsvorrichtung für Datenträger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022099344A1 (fr) 2020-11-13 2022-05-19 Miba Emobility Gmbh Procédé d'installation d'une machine à flux axial
EP4425106A1 (fr) * 2023-02-28 2024-09-04 Sick Ag Dispositif de détermination de position et système de détermination de position et procédé de fabrication associé

Also Published As

Publication number Publication date
ATE397801T1 (de) 2008-06-15
US20060145566A1 (en) 2006-07-06
US7394177B2 (en) 2008-07-01
CN1790875A (zh) 2006-06-21
DE502005004337D1 (de) 2008-07-17
DE102004060506A1 (de) 2006-06-29
EP1672770A1 (fr) 2006-06-21
CN1790875B (zh) 2011-07-06

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